I think we still need more information of needling (frequency, needle lenght etc.) and what else is needed for regrowth. We also dont know if possible regrowth is permanent or will hair fall after some time.
It can't be called permanent because the effect of DHT is still in play, however I think it can be safely said that microneedling helps regenerate hairs (and scalp) back to a youthful state. Meaning, someone could stop all treatment for a year or so, and still relatively maintain that hair, depending on how aggressive their male pattern baldness was. Then again, there's also a possible argument that microneedling could correct the underlying cause of male pattern baldness, such as if it was caused by inflammation.
It's pretty well accepted at this point that DHT isn't the direct cause of male pattern baldness, but more so DHT is a response to something occurring at the scalp level because it serves to function as an anti-inflammatory agent. There's a lot of people who have halted their male pattern baldness and even regrew *some* hair by taking certain Chinese herbs or simply switching to an all vegetable diet. It's why I believe that male pattern baldness is fundamentally caused by some sort of biochemical issue or something, but the exact nature of which is pure speculation. The same argument can be made about people with acne problems, which so many people have but is indicative of an unidentified health issue.
About the pain - I haven't used the Derminator2, but I understand it's highly effective and not as painful because the needles are very quick and do not spend that much time in the skin per cycle. Meaning it can be dragged across the skin without tearing or pulling on it horizontally. The maker of it did a test showing him dragging it across a piece of paper, and even he moved it very fast, the punctures were extremely clear with minimal tugging.
Awesome. I agree with the needling thing. Its the recovery between thats growing hair.
It's true that the genes associated with wound-healing also directly elevate hair growth factors, but it's more than that. Needling directly breaks up the fibrotic tissue which is known to be highly concentrated in balding scalps, and once this tissue is gone, that skin is naturally able to grow hairs far more easily, for up to many months longer. DHT itself only has a minor effect on hair loss because it's vasoconstriction effect that ultimately shifts more hairs out of the anagen phase. The actual cause of progressive balding overtime is due to the fibrotic tissue which slowly builds up as a direct result of DHT.